To do exactly as your neighbors do is the only sensible rule.
Ideal conversation must be an exchange of thought, and not, as many of those who worry most about their shortcomings believe, an eloquent exhibition of wit or oratory.
To the old saying that man built the house but woman made of it a home might be added the modern supplement that woman accepted cooking as a chore but man has made of it a recreation.
Manners are a sensitive awareness of the feelings of others. If you have that awareness, you have good manners, no matter what fork you use.